Sirtuin 3 and Its Role in Regulating Succinate Dehydrogenase Activity
Author Information
Author(s): Finley Lydia W. S., Haas Wilhelm, Desquiret-Dumas Valérie, Wallace Douglas C., Procaccio Vincent, Gygi Steven P., Haigis Marcia C.
Primary Institution: Harvard Medical School
Hypothesis
SIRT3 regulates the activity of succinate dehydrogenase (SDH) through deacetylation.
Conclusion
SIRT3 loss results in decreased SDH enzyme activity, indicating its role as a physiological regulator of SDH.
Supporting Evidence
- SIRT3 interacts with subunits of complex II and V of the electron transport chain.
- SIRT3 directly deacetylates SDHA in a NAD-dependent manner.
- SIRT3 KO mice show hyperacetylation of SDHA and reduced SDH activity.
Takeaway
SIRT3 helps keep a protein called SDH working properly, and when SIRT3 is missing, SDH doesn't work as well.
Methodology
The study used mass spectrometry to identify SIRT3 interacting proteins and assessed SDH activity in various mouse tissues.
Limitations
The study did not explore the effects of SIRT3 on SDH activity in all tissues or under all conditions.
Participant Demographics
Male 129Sv SIRT3 WT and KO mice were used in the study.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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